绑定构造函数

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在子类构造函数中使用Fatherconstructor.apply(this, arguments)

eg：

//父类function People(name,age){    this.name = name;    this.age = age;    this.species = "human";    this.getName = function(){        return this.name;    }    this.getAge = function(){        return this.age;    }    this.sayHello = function(){        console.log("hi,I am the father class");    }}//子类function Children(name,age){        People.apply(this,arguments)}var wish = new Children("wish");console.log("the name of wish is:"+wish.getName());  //the name of wish is:wish console.log(wish.sayHello());  //hi,I am the father class

 

 

使用prototype

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 详细见：

 

也使用prototype拷贝

准备拷贝函数：

function extend(Child, Parent){    var parent = Parent.prototype;    var child = Child.prototype;    for(var i in parent){        child[i] = parent[i];    }    child.uber = parent; //备用性质，指向上一层}

 

eg：

//父类function People(){}People.prototype.sayHello = function(){    return "hello";}People.prototype.getName = function(){    return this.name;}People.prototype.getAge = function(){    return this.age;}//子类function Children(name, age){    this.name = name;    this.age = age;}//定义拷贝函数function extend(Child, Parent){    var parent = Parent.prototype;    var child = Child.prototype;    for(var i in parent){        child[i] = parent[i];    }    child.uber = parent; //备用性质，指向上一层}//子类extend(Children, People);var wish = new Children("wish","20");console.log(wish.getName());  //wishconsole.log(wish.getAge());  //20console.log(wish.sayHello());  //hello

 

 拷贝继承

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function deepCopy(p, c) {　　　　var c = c || {};　　　　for (var i in p) {　　　　　　if (typeof p[i] === 'object') {　　　　　　　　c[i] = (p[i].constructor === Array) ? [] : {};　　　　　　　　deepCopy(p[i], c[i]);　　　　　　} else {　　　　　　　　　c[i] = p[i];　　　　　　}　　　　}　　　　return c;}

 

详细见：

 

参考：http://www.ruanyifeng.com/blog